Our chocolate male at my parents house has had ear problems after swimming since he was a young dog, now 10, there would be a lot of brown junk and his ears would be very sensitive when being petted. Dog lives 99% of his life outside. Our vet told us that labs have deep ear canals and it is very easy for bacteria and stuff to get in there with water and thrive. He gave us some ointment and its worked over the years but its annoying. He's been feed a large variety of food nothing fancy mostly whatever was cheap, just a family pet. I now have a pup of my own and after hunting him last weekend I noticed the same thing, not the sensitivity but the brown junk. He is only 9 months old, and spends about 50% of his life outside (when no one is home and usually at night) been feed Pro Plan Large Breed Puppy until about a month ago and now is on PPP. None of my buddies have ever had this problem with their pet or performance labs. Have any of you had this problem and if so have you figured out what more specifically than swimming causes it? Both dog houses are wood if that could be a source of the problem.